--- /dev/null
+--TEST--
+querystring offset set
+--SKIPIF--
+<?php
+include "skipif.inc";
+?>
+--FILE--
+<?php
+
+echo "Test\n";
+
+$qs = new http\QueryString("foo=bar&bar=baz");
+echo $qs,"\n";
+$qs["foo"] = "baz";
+echo $qs,"\n";
+?>
+===DONE===
+--EXPECT--
+Test
+foo=bar&bar=baz
+foo=baz&bar=baz
+===DONE===